| //shim to access google maps with require.js -- courtesy https://github.com/p15martin/google-maps-hello-world/ |
| define( |
| [ "async!https://maps.googleapis.com/maps/api/js?sensor=false" ], |
| function() { |
| var locationMarkers = {}; |
| // meters squared per entity |
| var area_per_entity = 300000000000; |
| var local = { |
| addMapToCanvas: function( mapCanvas, lat, long, zoom ) { |
| var myOptions = { |
| center: new google.maps.LatLng( lat, long ), |
| zoom: zoom, |
| mapTypeId: google.maps.MapTypeId.SATELLITE |
| }; |
| |
| return new google.maps.Map(mapCanvas, myOptions); |
| }, |
| |
| // TODO info window; massive code tidy |
| drawCircles: function(map, data) { |
| var newLocs = {}; |
| var id; |
| var lm; |
| _.each(data, function(it) { |
| if (it.latitude == null || it.longitude == null || (it.latitude == 0 && it.longitude == 0)) { |
| // Suppress circle if not set or at (0,0); slightly clumsy, but workable |
| } else if (lm = locationMarkers[id]) { |
| // Update |
| var latlng = new google.maps.LatLng(it.latitude, it.longitude); |
| |
| lm.circle.setRadius(local.radius(local.computeLocationArea(it.leafEntityCount))); |
| lm.circle.setCenter(latlng); |
| lm.marker.setPosition(latlng); |
| // lm.infoWindow.setPairs(l); |
| |
| newLocs[id] = lm; |
| } else { |
| // Add |
| var circle = local.drawCircle(map, it.latitude, it.longitude, local.radius(local.computeLocationArea(it.leafEntityCount))); |
| |
| var marker = new google.maps.Marker({ |
| map: map, |
| position: new google.maps.LatLng(it.latitude, it.longitude) |
| }); |
| |
| // TODO from old grails app |
| // var infoWindow = new Brooklyn.gmaps.ListInfoWindow(l, map, marker); |
| |
| circle.bindTo('center', marker, 'position'); |
| newLocs[id] = {circle: circle, |
| marker: marker |
| // , |
| // infoWindow: infoWindow |
| }; |
| } |
| }) |
| |
| // TODO yuck, we assume location markers (static field) are tied to map (supplied) |
| for (id in locationMarkers) { |
| if (! newLocs[id]) { |
| // location has been removed |
| lm = locationMarkers[id]; |
| lm.circle.setMap(null); |
| lm.marker.setMap(null); |
| lm.infoWindow.getInfoWindow().setMap(null); |
| } |
| } |
| locationMarkers = newLocs; |
| }, |
| |
| drawCircle: function(map, lat, lng, radius) { |
| var circle_latlong = new google.maps.LatLng(lat, lng); |
| var circle_options = { |
| map: map, |
| center: circle_latlong, |
| clickableboolean: false, |
| fillColor: "#FF0000", |
| fillOpacity: 0.4, |
| radius: radius, // meters |
| strokeColor: "#FF0000", |
| strokeOpacity: 1, |
| strokeWeight: 1, |
| zIndex: 1 |
| }; |
| |
| return new google.maps.Circle(circle_options); |
| }, |
| |
| /* Returns the area in square meters that a circle should be to represent |
| * count entities at a location. */ |
| computeLocationArea: function(count) { |
| return area_per_entity * count; |
| }, |
| |
| /* Returns the radius of a circle of the given area. */ |
| radius: function(area) { |
| return Math.sqrt(area / Math.PI); |
| } |
| |
| // function drawCirclesFromJSON(json) { |
| // var newLocs = {}; |
| // var id; |
| // var lm; |
| // |
| // for (id in json) { |
| // var l = json[id]; |
| // if (l.lat == null || l.lng == null || (l.lat == 0 && l.lng == 0)) { |
| // // Suppress circle if not set or at (0,0); slightly clumsy, but workable |
| // } else if (lm = locationMarkers[id]) { |
| // // Update |
| // var latlng = new google.maps.LatLng(l.lat, l.lng); |
| // |
| // lm.circle.setRadius(radius(location_area(l.entity_count))); |
| // lm.circle.setCenter(latlng); |
| // lm.marker.setPosition(latlng); |
| // lm.infoWindow.setPairs(l); |
| // |
| // newLocs[id] = lm; |
| // } else { |
| // // Add |
| // var circle = drawCircle(l.lat, l.lng, radius(location_area(l.entity_count))); |
| // |
| // var marker = new google.maps.Marker({ |
| // map: map, |
| // position: new google.maps.LatLng(l.lat, l.lng) |
| // }); |
| // |
| // var infoWindow = new Brooklyn.gmaps.ListInfoWindow(l, map, marker); |
| // |
| // circle.bindTo('center', marker, 'position'); |
| // |
| // newLocs[id] = {circle: circle, |
| // marker: marker, |
| // infoWindow: infoWindow}; |
| // } |
| // } |
| // |
| // for (id in locationMarkers) { |
| // if (! newLocs[id]) { |
| // // location has been removed |
| // lm = locationMarkers[id]; |
| // lm.circle.setMap(null); |
| // lm.marker.setMap(null); |
| // lm.infoWindow.getInfoWindow().setMap(null); |
| // } |
| // } |
| // locationMarkers = newLocs; |
| // } |
| |
| } |
| |
| return local; |
| } |
| |
| ); |
